
import {INCREMENT,DECREMENT} from './constant';
const initState=0
export default function countReducer(preState=initState,action){
   
    const {type,data}=action
    console.log(type,data)//@@redux/INITi.g.d.2.1.u undefined
    console.log(preState);
    switch (type) {
        case INCREMENT:
            return preState+data
        case DECREMENT : 
            return preState-data 
        default:
            return preState
    }
}